Mold.



F. P. MARTIN.

MOLD- APPLICATION FILED uov. 25. 1912.

1,152,334. Patented Aug. 31,1915.

Attorneys MOLD.

Specification of Letters Patent.

Patented Aug. 31, 1915.

Application file'xl Novcmber 25, 1912. Serial No. 733,502.

To all whom it mag concern: I

Be it known that'I, FRANK P. MARTIN, a citizen of the United States, residing at Williamsburg, in the county of Franklin and State oi" Kansas, have inventeda new useful Mold, of whichthe following isa specification.

This invention relates: to a mold for buildingconcrete silos, water tanks, smoke I stacks and similar structures.

An object of the invention is to provide a moldcomprising adjustable internal-and external walls and novelmeans for adjusting the walls;

\Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides-in the 'combin-ation and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of wh-at is claimed, without departing from the spirit of the invention.

In the drawings accompanying this speci fication and forming a part thereof: Figure 1 is a plan view of the improved mold. Fig. 2 is a sectional view taken on the line AA of Fig. 1. Fig. 3 is a perspective detail of the sliding joint illustrated at B in Fig. 1. Fig. 4 is a fragmental plan view of the joint between two removable sections.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, the external wall is composed of the sections 1, 2, 3 and 4. A plurality of adjusting devices connect the sections 1 and 4, each of the said devices embodying a pair of V-shaped brackets 5 and 6 terminally secured to the sections 1 and 4 of the outer wall or shell adjacent the overlapped edges of the said sections, and the arms of the brackets 5 and 6 lie in a common plane. Alined rods 7 and 8 have their remote ends pivotally connected to the brackets 5 and 6, and to this end U-shaped clips 7 have their bends secured to the adjacent arms of the brackets, and have their arms projecting toward one another, and pivot elements 7 are engaged through the arms of the clips and have the remote ends of the rods 7 and 8 pivotally engaged thereto within the clips. A turn buckle 9 is threaded upon the adjacent portions of the rods 7 and 8, whereby buckleis rotated. Therods 7 andS are thus pivotally engaged to the brackets 5 and 6 in an eliicient'and desirable manner, where I by the rods may vibrate relative to the brackets if necessary. The joints between the-various other sections in this "outer wall are made by simply lapping the sections and securing them together by means-of bolts or the like. It will be readily understood thatthe outer wall may be adjusted so that circles of various diameter may be described by adding or removing a number of thesections. In order that said outer wall may be given a more precise adjustment and in order that the outer wall may be easily rem'ovedfrom the-concrete after the latter has su fliciently hardened, the sliding joint and turn buckles therefor has been provided.

Theinternal wall is composed of a plurality of sections 10, 11,12, and 13. The joints between the various sections are somewhat similar to the joint between the outer wall sections and are more fully illustrated in Fig. 4, transverse bars 14 and 15 being disposed inside of the inner wall sections through which the securing bolts 17 pass. The sliding joint B is provided between the sections 12 and 13, this joint being illustrated in perspective in Fig. 3. At the joint B, the section 12 overlaps the outer side of the section 13, and the transverse bars 14 which are secured to the inner sides of the section 12, are provided with the inwardly offset portions 18 overlapping the inner side of the section 13, and a longitudinal bar or strip 18 is secured to the inner side of the section 13 adjacent the section 12, and is provided with a series of inwardly projecting offsets 18 which receive the voll'set end portions 18 of the bars 14, whereby the sections 12 and 13 will be adapted to slide transversely relative to one another, with- FRANK-R MARTIN, OFQWILLIAMSBURG, KANSAS.

out the liability of the sections 12 and 13 2 mannerthat the rods 7 and 8 are pivotally .connected to the brackets 5 and 6, and the adjacent ends of the rods 28 are connected by turn buckles 29." The brackets 20 and 27 which are located at the opposite sides of the joint B are connected by means of threaded rods 31 .pivoted to the brackets 20 I and 27, and turn buckles 3O threaded upon the rods 31,- whereby the turn buckles 30 may be rotated for adjusting the inner wall or shell. The turn buckles 30 allow the inner wall or shell to be readily adjusted,

-; and extended or contracted as desirable or necessary,

In use, the approximate size of the mold is obtained by removing or adding a suitable number of sections, and then in the case'ofthe internal wall the turn buckles .wall is expanded by means of its turn buckles and the internal wall contracted by means of the turn buckles 30. By this op eration, the mold walls are disengaged from the concrete and may then be raised in order to form the next concrete section thereabove. In this manner, the chimney or other structuremay be built to any desired height. Furthermore, by removing suitable sections as the structure is built up and by a suitable manipulation of the various turn buckles, the chimney will be built with a decreasing diameter and decreasing wall thickness as is the present practice in the construction of chimneys, water tanks, etc.

What I claim is In a mold, a flexible shell, a pair of V- shaped brackets terminally secured to the shell and having their arms lying approximately in a common plane, U-shaped clips having their bends secured to the adjacent arms of the brackets and having their arms projecting toward one another, pivot elements engaged through the arms of the clips, alined rods having their remote ends pivotally engaged to the said pivot elements within the clips, and a turn buckle threaded upon the adjacent portions of the rods.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

FRANK P. MARTIN.

Witnesses:

J. C. AsHoRAr'r, R. G. WARWICK.

'- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

